Fix CT002 efficiency-rotation lockup when push-based powermeter goes silent #618

Job	Run time
lint	18s
validate (3.13)	40s
validate (3.10)	37s
validate (3.11)	36s
validate (3.12)	37s
build-addon (linux/amd64, addon-linux-amd64) / build	45s
build-addon (linux/arm64, addon-linux-arm64) / build	35s
build (linux/amd64, base-linux-amd64) / build	25s
build (linux/arm64, base-linux-arm64) / build	36s
build (linux/arm/v7, base-linux-arm-v7) / build	22s
merge / merge	18s
merge-addon / merge	13s
	6m 2s

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